Optical and dielectric properties of organic laser dye Rhodamine 6G doped silica xerogels with the variation of the sol-gel parameters

摘要

The effect of sol-gel parameters such as pH of the alcosol, R6G/TEOS, H_2O/TEOS and EtOH/TEOS molar ratios on the optical and dielectric characteristics of R6G doped silica xerogels are reported here. Optical absorption and emission have been studied in the visible range. The dielectric property such as dielectric permittivity (epsilon') is carried out for pure and the R6G doped silica xerogels in the frequency range of the applied field (/) from 100 Hz to 1 MHz. It has been found that the optical and dielectric properties of the R6G doped silica xerogels are strongly dependent on the sol-gel parameters. Monolithicity and transparency of the R6G doped silica xerogels have also been studied. There is a remarkable shrinkage with the variation of the sol-gel parameters.